Font size
WorksheetsElectric and Magnetic Forces
Total questions: 10
Worksheet time: 10mins
Which of the two below result in an attractive force?
A positive charge and a negative charge
Two negative charges
Two south poles
A north pole and a south pole
Two postive charges
Static electricity is the buildup of charges between two objects. What best explains why a balloon is attracted to hair when the two have been rubbed together?
The balloon and hair both have positive charges
The balloon and the hair both have negative charges
The balloon and the hair both have neutral charges
The balloon and the hair both have opposite charges
Which of the following most closely resembles an electromagnetic?
Two bar magnets are held close together. They are released and allowed to move freely. The bar magnets quickly come together. Which best explains why this happens?
The poles facing one another are both south poles
The poles facing one another are both north poles
The poles facing one another are opposite poles
One magnet was bigger than the other
Frederick sets paper clips out on a table. He then takes a magnet, places it directly beneath the paper clips under the table, and moves the magnet. He finds that the paper clips move with the magnet. Why does this happen?
Magnetic force is a repellant force
Magnetic forces act on wood, like in the table
The paper clips are feeling the gravitational force of the magnet
Magnetic forces act at a distance, even betwewn objects
Surrounding each magnetic is an invisible force field called
Gravity
A magnetic field
An electric field
The Force
In an electromagnet, coils of wire are wrapped around a magnetic object to generate a magnetic field. What the is relationship between number of coils and the strength of the magnetic field?
The more coils an electromagntic has, the stronger the magnetic field
The more coils an electromagntic has, the weaker the magnetic field
The larger the metal object, the stronger the magnetic field is
There is no relationship between number of coils and the strength of a magnetic field
To decrease the strength of a magnetic field around an electromagnet, we must
increase the number of coils
increase the size of the iron core
decrease the size of the iron core
decrease the number of coils
What is the cause of electricity?
Magnetism
Gravity
Moving electrons
Lightning
A Van der Graff generator works by
Causing the outside of the metal ball to become positively charged
Causing the outside of the metal ball to become neutrally charged
Causing the outside of the metal ball to become a bar magnet
Causing the outside of the metal ball to become negatively charged
